He added with a humorous slant: 'Allen has been off his meds for six months when this movie starts. I told you to never to go off your meds, why did you do that?'

'Going off my meds is all part of the reserarch,' replied Zach good-naturedly. 'Allen goes off his medication and the guys are worried about him so they try to take him to an institution.'

Intervention: The often reserved morning show host asked Zach if he's ever gone through an intervention like his Hangover 3 character

Feeling nervous: Matt had an awkward moment when Zach asked him right back if he's ever had an intervention, adding 'Do you need one?'

That's when Matt honed in with a clincher, saying: 'They conduct an intervention, Allen's friends and famil members.

'Have you been part of a real life intervention? Have you ever been the subject of a real life intervention?'

Some celebrities might be put off by such a direct line of questioning, but Zach has a flair for comedic timing - and Matt doesn't.

'I called my parents once and asked them to do an intervention on me but they declined,' Zack joked.

Then more seriously the comedian said: 'No, I haven't been part of a intervention, have you?'

Bold one: The funny man, who has won praises for his hosting gig on Saturday Night Live, then went on to question Matt whether he would like to host the skit comedy show

Matt visibly fumbled with his words before replying: 'No, I haven't.'

'Do you need one?' Zach continued.

'Different schools of thought on that,' Matt allowed.

And then when Matt praised Zach's successful hosting gig on Saturday Night Live, the funny man zoomed in with another question.

'Have you done it? Would you do it?' Zach wanted to know.

So popular: Zach reunites with film buddies Bradley Cooper and Ed Helm in the third installment to the box office hit

Matt stammered that he would 'if I was asked.'

'OK, let me see what I can do,' Zach comforted him.

The longtime host was only too glad to steer the conversation in more neutral territory.

Hangover 3 reunites Zach with his film buddies Bradley Cooper and Ed Helms and this time revolves around a wild road trip.

Road trip: Their antics have already messed up the bachelor party and the wedding, and now the guys go on a road trip together

'It's hard to sustain,' Zach said of the previous films success. 'You wonder if the crowd's going to be interested in it. Ultimately, I think it turned out really great. I'm really happy with it.'

Lauer, meanwhile, is not the most popular guy on television at the moment, after being partly blamed for Ann Curry's messy departure from Today last year.

'If you’ve been following the papers lately, you know it’s been a bit rough for me,' Matt joked recently. 'These days, I only get asked to host dinners if polio is busy. Yup, I have a lower Q rating than polio right now.'